Floor-surfacing machine



- I 1,635 480 July 1927' 4 o. B. JACOBSON' FLOOR SURFACING MACHINE FiledJuly 18, 1925 INVENTOR. 001mm 5. $4 0 55 am,

A TTORNE Y.

Patented July 12, 1927.

OMAND B. JACQ BSON, OF WAUKEGAN, ILLINOIS.

FLOOB-S'UBFACING MACHINE.

Application filed July 18, 1925. Serial No. $4,565

This invention relates to that class of floor surfacing machines inwhich a pair of surfacing heads of the rectangular slab type arearranged side by .side in' the housing of the machine and receivesimultaneous reciprocation in opposite directions from a drivingmechanism mounted upon said housing. And the present improvement has forits object To provide a structural formation and combination of partsand features, affording a substantial and efficientsupporting andguiding means for the reciprocatingsurfacing heads or slabs of themachine combined with a housing shell or structure adapted to supportthe operating mechanism of said heads or slabs in the attainment of acompact and substantial machine as a whole, all as will hereinafter morefully appear.

In the accompanving drawing Fig. 1, is a side elevation with partsbroken away and withthe enclosing shell or housing in section.

Fig. 2, is a top view with the shell or housing in section. 1

Fig. 3, is a transverse section on line 3-3 Fig. '1.

Like reference numerals indicate like parts in the difierent views.

The main shell or housing of the machine is of an open bottom shellform, divided midway its height into a main lower section 1 and a topsection 2 of a cap form, with the two sections fixedly connected attheir meeting edges and with said edges formed with counterpart recessesconstituting journal bearings for the transversely arranged shafts ofthe hereinafter described driving mechanism of the machine. In thepresent improvernent, the cavity of the shell or housing is divided byalongitudinal wall or partition 3, which in turn is divided midway itsheight in a manner complementary to the above described division of themain shell or housing. The end'walls 4 of the shell or housing arepreferably of the inclined form asshown, with a view to lightness andconvenience in the manipulation of the machine bythe operator.

Adjacent to the lower ends of the side walls of the lower shell section1 and of the wall or partition 3, are arranged pairs of opposed anlongitudinally extending series of track rollers 5 and 6, forming idetracks for the pair of surfacing lien or slabs now to be described. j

nection with the adjacent upper faces of the heads or slabs providelongitudinal channels for tracking engagement with the aforesaid trackrollers 5, 6, of the main shell or housing and of the longitudinalpartition 3 of the same. In addition the upper faces of the slabs 7, 8,carry upstanding ears 11 for pivotal attachment of the pitmans of anoperating mechanism as follows:

An operating electric or like motor 12, is secured to the to of the mainshell or housing of the machine, with its armature shaft connected bysprocket wheel and chain connection 13, or like gearing, with anintermediate transverse shaft 14 journaled within the shell or housingand in a set of the hearing recesses formed at the line ofdivisionbetween the lower and upper portions 1, 2 of said shell and the likeportions of the partition 3, as heretofore referred to.

Operatively connected, by a sprocket wheel and chain connection 15, withthe aforesaid transverse shaft 1.4, is a transverse crank shaft 16, alsomounted within the shell or housing in manner similar to that abovedescribed in connection with the intermediate transverse shaft '14.

In the present improvement the crank p01- tions 17 and 18 of the crankshaft 16 are arranged in diametrically opposed relation to each other asshown, and have individual operative connections, by pitmen 19 and 20with the respective surfacin heads or slabs 7 and 8, and as so arrangedare adapted to impart simultaneous reciprocation to said heads or slabsin opposite directions.

At one end *of the main shell or housing, a transverse axle 21 isarranged for the support of wheels 22, upon which the machine as a wholeand in a. tilted condition can be moved from location to location asrequired.

And in connection. with such wheel provision the shell or housing isrovided with a handle 23, for such use, as we 1 as for moving themachine along the floor as the surfacing of the same progresses.

Havin thus fully described my intention, What I c aim and desire tosecure by Letters Patent, is

In a floor surfacing machine, the combination of a main casing open atbottom and formed by upper and lower sections with the abutting faces ofsuch sections formed with complementary portions of a lurality ofbearing recesses, and a central ongitudinal partition in said casing, apair of surfacing slabs having side by side relation, track connectionsbetween the lower casing section and the surfacing slabs comprisinglongitudinal track flanges extending laterally from the sides of onepart, and 15 track rollers on the other part having engagement with saidtrack flanges, a crank shaft mounted in the bearing recesses in seambetween the casing sections and formed with a pair of diametricallyopposed crank 20 members, pitmen connecting said crank members with thesurfacing slabs, and 13118835 for imparting rotation to the crank Signedat Waukegan, Illinois, this 20612 day of June, 1924.

OMAND B. JAGOBSQN.

